[balsa/52-fix-clang-9-fails] libbalsa/imap: Fix a clang-9 issue

[Peter Bloomfield <peterb src gnome org>]

commit 3b0bbca766ab4624b73adb40833cda195e95eabc
Author: Peter Bloomfield <PeterBloomfield bellsouth net>
Date:   Sun Jan 10 18:43:24 2021 -0500

    libbalsa/imap: Fix a clang-9 issue
    
    with using G_DECLARE_FINAL_TYPE for ImapMboxHandle.
    
    Well, it is not really a clang-9 issue, it is all about redefinition of
    a typedef, which is a C-11 feature.
    
    modified:   libbalsa/imap/imap-handle.c
    modified:   libbalsa/imap/libimap.h

 libbalsa/imap/imap-handle.c |  6 ------
 libbalsa/imap/libimap.h     | 11 +++++++----
 2 files changed, 7 insertions(+), 10 deletions(-)
---
diff --git a/libbalsa/imap/imap-handle.c b/libbalsa/imap/imap-handle.c
index 625a121eb..5f112f090 100644
--- a/libbalsa/imap/imap-handle.c
+++ b/libbalsa/imap/imap-handle.c
@@ -69,12 +69,6 @@ static gboolean async_process(GSocket      *source,
                                                          GIOCondition  condition,
                                                          gpointer      data);
 
-G_DECLARE_FINAL_TYPE(ImapMboxHandle,
-                     imap_mbox_handle,
-                     IMAP,
-                     MBOX_HANDLE,
-                     GObject)
-
 G_DEFINE_TYPE(ImapMboxHandle, imap_mbox_handle, G_TYPE_OBJECT)
 
 static void
diff --git a/libbalsa/imap/libimap.h b/libbalsa/imap/libimap.h
index 1382e5721..2a42fce75 100644
--- a/libbalsa/imap/libimap.h
+++ b/libbalsa/imap/libimap.h
@@ -17,8 +17,13 @@
  * along with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 
-#include <time.h>
-#include <glib.h>
+#include <glib-object.h>
+
+G_DECLARE_FINAL_TYPE(ImapMboxHandle,
+                     imap_mbox_handle,
+                     IMAP,
+                     MBOX_HANDLE,
+                     GObject);
 
 /* connection states, as defined in rfc-2060, 3 */
 typedef enum {
@@ -228,8 +233,6 @@ typedef struct ImapMessage_ {
                                     * in question is not present. */
 } ImapMessage;
 
-typedef struct _ImapMboxHandle      ImapMboxHandle;
-
 ImapEnvelope *imap_envelope_new(void);
 void imap_envelope_free(ImapEnvelope *);
 gchar* imap_envelope_to_string(const ImapEnvelope* env);